Re: [mpls] MPLS Open DT meeting 20021-09-23

Stewart Bryant <stewart.bryant@gmail.com> Thu, 30 September 2021 14:09 UTC

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From: Stewart Bryant <stewart.bryant@gmail.com>
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Date: Thu, 30 Sep 2021 15:09:20 +0100
Cc: Stewart Bryant <stewart.bryant@gmail.com>, =?utf-8?Q?Bal=C3=A1zs_Varga_A?= <balazs.a.varga=40ericsson.com@dmarc.ietf.org>, Loa Andersson <loa.pi.nu@gmail.com>, mpls <mpls@ietf.org>, "pals-chairs@ietf.org" <pals-chairs@ietf.org>, "mpls-chairs@ietf.org" <mpls-chairs@ietf.org>, DetNet Chairs <detnet-chairs@ietf.org>
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To: loa Andersson <loa@pi.nu>
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Subject: Re: [mpls] MPLS Open DT meeting 20021-09-23
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Hang on, we need a network scenario to answer this.

If I have a pair of DetNet nodes and I connect them with a tunnel it is fine provided the tunnel provides the required transmission characteristics.

If the tunnel bypasses a DetNet node that should be in the Detnet  overlay network, then the network configuration has broken the required DetNet service.

The tunnel endpoints can be coincident with the DetNet nodes provided the packet is processed at each “layer”.

However to provide a definitive answer we need to see the network scenario that Loa has in mind.

- Stewart



> On 26 Sep 2021, at 10:36, Loa Andersson <loa@pi.nu> wrote:
> 
> Balázs,
> 
> Thanks for the clarification. One question, one futher question.
> 
> What happens if a DetNet packet is put into a tunnel, and the nodes of the tunnel is not aware of DetNet.
> 
> A node carrying the tunnel want to run OAM over a segment of the tunnel?
> Where is the PSD put?
> 
> /Loa
> 
> 
> 
> On 23/09/2021 17:55, Balázs Varga A wrote:
>> Hi,
>> As asked during the call, MPLS data plane for DetNet is described here:
>> https://datatracker.ietf.org/doc/rfc8964/ <https://datatracker.ietf.org/doc/rfc8964/>
>> DetNet PW has a mandatory d-CW (DetNet Control-Word).
>> Details on procedures are also described in the document.
>> Further RFC’s on DetNet:
>> https://datatracker.ietf.org/group/detnet/documents/ <https://datatracker.ietf.org/group/detnet/documents/>
>> Cheers
>> Bala’zs
>> *From:* mpls <mpls-bounces@ietf.org> *On Behalf Of * Loa Andersson
>> *Sent:* Thursday, September 23, 2021 12:33 PM
>> *To:* mpls <mpls@ietf.org>
>> *Cc:* pals-chairs@ietf.org; mpls-chairs@ietf.org; DetNet Chairs <detnet-chairs@ietf.org>
>> *Subject:* [mpls] MPLS Open DT meeting 20021-09-23
>>  DT,
>> We will have a meeting today asuual.
>> You'll find a tentative have aagenda at:
>> https://trac.ietf.org/trac/mpls/wiki/2021-09-23-agenda <https://trac.ietf.org/trac/mpls/wiki/2021-09-23-agenda>
>> Please note that it is very much "wsork in progress", the last updates will probably be made just before the meeting.
>> /Loa
>> _______________________________________________
>> mpls mailing list
>> mpls@ietf.org
>> https://www.ietf.org/mailman/listinfo/mpls
> 
> -- 
> 
> Loa Andersson                        email: loa@pi.nu
> Senior MPLS Expert                          loa.pi.nu@gmail.com
> Bronze Dragon Consulting             phone: +46 739 81 21 64